343.85% is the change from 187 to 830
Calculation steps:
[( 830 - 187 ) ÷ 187] x 100 = 343.85%
Formula
Percentage change = [(830 - 187) / 187] x 100
Subtract the new number by the original number
830 - 187 = 643
643 ÷ 187 = 3.4385026737967914
3.4385026737967914 x 100 = 343.85%